From 9d0456822c4fec302608d4161ae9d9cfe81100b1 Mon Sep 17 00:00:00 2001 From: York Sun Date: Tue, 24 Jun 2014 21:16:20 -0700 Subject: powerpc/mpc85xx: Check return value of find_tlb_idx find_tlb_idx() is called in board_early_init_r() on multiple boards. The return value is not checked before being used to disable a TLB. In normal case the return value wouldn't be -1. In case of a mis- configuration during porting to a new board, checking the return value may be helpful to reveal some user errors. Signed-off-by: York Sun --- board/freescale/p1022ds/p1022ds.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) (limited to 'board/freescale/p1022ds') diff --git a/board/freescale/p1022ds/p1022ds.c b/board/freescale/p1022ds/p1022ds.c index ba789a4daf..f5e18515a0 100644 --- a/board/freescale/p1022ds/p1022ds.c +++ b/board/freescale/p1022ds/p1022ds.c @@ -249,7 +249,7 @@ void pci_init_board(void) int board_early_init_r(void) { const unsigned int flashbase = CONFIG_SYS_FLASH_BASE; - const u8 flash_esel = find_tlb_idx((void *)flashbase, 1); + int flash_esel = find_tlb_idx((void *)flashbase, 1); /* * Remap Boot flash + PROMJET region to caching-inhibited @@ -260,8 +260,14 @@ int board_early_init_r(void) flush_dcache(); invalidate_icache(); - /* invalidate existing TLB entry for flash + promjet */ - disable_tlb(flash_esel); + if (flash_esel == -1) { + /* very unlikely unless something is messed up */ + puts("Error: Could not find TLB for FLASH BASE\n"); + flash_esel = 2; /* give our best effort to continue */ + } else { + /* invalidate existing TLB entry for flash + promjet */ + disable_tlb(flash_esel); + } set_tlb(1, flashbase, CONFIG_SYS_FLASH_BASE_PHYS, MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G, -- cgit v1.2.1